Machine for forming valve bags



Dec. 21, 1937. J K 2,102,767

MACHINE FOR FORMING VALVE BAGS Original Filed Aug. 29, 1934 3 Sheets-Sheet l Fir-1.1.. ,2

INVENTOR JOHN N. TOOKER ORNEYS Dec. 21, 1937. J. N. T OKER I 2,102,767

MACHINE FOR FORMING VALVE BAGS I Original Filed Aug. 29, 1934 3 Sheets-Sheet 2 INVENTOR JOHN N. TOOKER Dec. 21, 1937. J. N. TOOKER MACHINE FOR FORMING VALVE BAGS Original Filed Aug. 29, 1.954 5 Sheets-Sheet 3 INVENTOR J 0 HN N. TooKER Ticifi.

Y v I In] 1 AT ORNEYS PatentedDec. ,21, 1937 v d MACHINE FOR- FOBIMING VALVE BAGS John N. Tooker, Canaioharie, N. Y., asslgnor to Bartlett Arkell, New York, N. Y.

Original application August 29, 1934, Serial No. 741,892. Divided and this application April 22, 1936, Serial N0. 75,713

1 Claim. (Cl. 93-8) The present invention relates to machines for form a hinged portion which is so arranged that use in the manufacture of, valve bags and espeit tends to snap firmly and tightly into engagecially multi-ply bags having pasted or satchel ment with the upper wall of the valve throughends and has for its object to provide a novel out the overlying portion thereof when the bag and improved machine of this character. is filled and the filling tube is withdrawn.

For an understanding of the invention, refer- In accordance with the present invention, such ence should be had to the accompanying drawscoring or creasing is performed at the stage of ings, of whichthe bag manufacture when its end is in spread Figure 1 is a plan view of a bag tube illustratand flattened condition as above described, the ing the first step in the method of forming the creasing being done on lines 22 and 24. 101

bag on my improved machine; As in the bag of said Du Bois application,

Figs. 2 and 3 are views illustrating successive these creases 22 and 24 together form a V havsteps in the forming of the valve end of the bag; ing its apex on the infolded median fold 26 of Fig. 4 is a plan view of the valve end of the the bag tube and with legs extending away from completed bag; the adjacent end of the bag tube to the folds 15 Figs. 5 and 6 are perspective views of the valve 28 and 30 forming the edges of flap M. This V- end of the completed bag showing the valve in shape crease, which is convex on the outer suropen and closed position, respectively; face of flap l4, dividesthe flap area into a subs a Ve sectional V ew along the stantially diamond shape portion indicated at 50 line of Fig. 6; 32 and a portion, indicated at 34, lying between Fig. 8 is a side view, partly in section and the end of the tube and the folds 28 and 30. P y diagrammatic, t ng the novel fea- After the creases 22 and 2d are formed, the end tu e of the improved bOttOmeI machine. of the bag tube is scored along parallel lines 36 structed according to the invention; and 38. 35 Fig. 9 is a transverse sectional view taken along s ore 36 extends transversely of the bag from .the line 9--9 of Fig. 8 and the junction of folds 22 and 28 and similarly Fig. 10 is an enlarged detail view showing porscore 38 extends transversely of the bag from tions of the convex fold formin members of the junction of folds 24 and 30. Wall portion the machine of Figs. 8 and 9. I8 is then folded inwardly upon score line 38 20 The bag Produced y y improved machine is and wall portion i6 is similarly folded inwardly 0f the type of the one described and claimed in upon score line 36 to form overlapping side flaps, th P n applieatien f Alfred Du Bois. S and the folded parts pressed firmly together to No- 7 fil r y 9, 1934. cause the paste to seal all of the end of the bag ex- In forming a pasted or satchel ended bag, a cept th valve flap It.

as pap r tub of e d s number of p i s s first In the so completed bag end, the convex fold as cut by y s e m s n b hs such or crease 22 of the valve lies adjacent the portion as dicated at 2 in c bag e gth has of the fold 28 lying between the end of score the us al s rr ted edges 4 and a centrally 36 and slot l0, and crease 2| lies adjacentthe posed tab 6 on one wall thereof at one end with p rtion of the mm 20 lying between the end of a correspondingv cut out 8 of the same wall at s ore 38 and the corresponding slot Ill. During 40 the other end. To form a pasted end has, each n t d of th filling tube, indicat d i such has n th is first t longitudinally at One dotted lines in Fig. 5, depresses the valve flap end form Slots The slotted end of the and forces the creases 22 and 24 downwardly. bag length is then spread and flattened into the when the bag is fined and the fining tube position indicated in with the end flaps moved, the convex creases 22 and 24 cause the i2 and I 4 between corresponding slots l0 folded valve flap to snap into the position indicated in inwardly toward the axis of the bag and wall portions l6 and i8 spread. Paste, indicated at Figs 6 and 7 a z tight of g g g fi 20 (Fig. 3) ,is then applied over the surface of is effected an creases re posifloneto a wall portion l8 and over the greater part of the cent the upper folded edges of e an form 50 inwardly folded flap No paste is applied to a seal therefor. Upon closure of the valve, as the flap ll, which serves as the valve when th shown best in Fig. 7 the central portion of area bag is completed. 34 of flap It lies flush with the top surface of In the bag of said Du Bois application, the the bag formed by the pasted overlapping wall 58 under flap of the valve is scored or creased to sections [6 and I8, reinforcing the end of the bag and preventing seepage of the contained material toward the valve.

The method above described may be and preferably is the same as the method described and claimed in my pending application Serial No. 741,892, filed August 29, 1934 of which the present application constitutes a division.

My improved machine is adapted to carry out automatically the above described method (Figs. 8, 9 and 10) The machine is of the general type now in use and known as a bottomer machine, but is modified, in accordance with the invention, to include means for formingthe convex folds or creases hereinbefore described in connection with Figs. 1 to 7 inclusive.

Themachine includes the usual roll 40 and associated means (not shown) for forming the slots i and for spreading the end of the tube, the usual flattening drum 42, a pasting segment 44 cooperating with a drum 4B and receiving paste from a paste roller 48 through the intermediary or roller 50, and scoring rollers 52 for forming the transverse scores or creases 36 and 38. Pasting segment 44 is rigidly secured to a shaft N for rotation thereby, and drum 4B is similarly secured to and rotated by ashaft 56, shafts M and 58 being suitably driven in timed relation by means of gears 58.

In accordance with my invention an arm 60 is rigidlysecured at one end to shaft 54 to be rotated thereby. The other end of arm 64 carries a block 62 having a V-shaped groove 84 therein which is disposed with its apex toward the pasting segment and its arms extending substantially at right angles therefrom. An arm 88 having at one end thereof a V-shaped projection 88 for cooperation with the groove 84, is secured to drum 48 by means of a pin '10 to rotate therewith.

Adjacent the creaser arms 80 and 66 and rigidly mounted on shafts 54 and 56 is one pair of aligned pulleys I2 for engaging one lateral edge of the bag tube during passage thereof between the creasers and between the drum l6 and the pasting segment. A similar pair of aligned pulleys 14 is provided for engagement with the other lateral edge of the bag. Thus, as the flattened end of a bag tube advances from beneath the pressure roller 42 and passes over the drum 4D with its edges guided and held by pulleys l2 and 14 a portion I8 of the pasting segment 44 first applies paste to wall portion l8. Immediately thereafter, during the application of paste to flap i2 by a portion IS-of the pasting segment, the arms ill and 88 move into position where projection it enters groove 84 and forms the convex creases 22 and 24.- In Fig. the creasers are shown just prior to engagement. when. the end of the bag length advances into position between rolls 52 the transverse scores 38 and 38 are formed.

Thereafter the wall portions I6 and it are' folded by any suitable means (not shown). along the score lines 36 and 38 and pressure is applied to the pasted portions. The bag length may then be run through another bottomer machine so as to close its other end in the usual manner. 1

It will be apparent as the desired creasing to form the hinged portion in the under flap of the valve is preferably eil'ected during the operation of closing the valve end of the bag tube, that this may be accomplished without interrupting such operation. The creasing or hinge forming devices may be easily applied to the usual bottoming machine and when in use do not interfere with the speed of operation of the machine.

As will be evident to those skilled in the art, my invention permits various modifications without departing from the spirit thereof or the scope of the appended claim.

What I claim is:-

In aiba'g machine, the combination of a rotatable pasting segment and a drum adapted to cooperate therewith to engage opposite surfaces of the spread and flattened end of a bag tube, means operated in timed relation with the rotation of said segment for forming a V-shaped crease in one infolded flap of the bag tube during the period of engagement of the tube by said segment and drum, and a shaft to which said pasting segment is secured for rotation thereby, said creaseone rigidly secured to said shaft in substantial radial alinement with a portion of said segment and the other of said members secured to said drum for rotation thereby, one of said members having a V-shaped groove therein and the other of said members having a correspondingly shaped projection thereon whereby the V-shaped crease is formed in the flap of the bag tube when said projection and groove are alined and in engagement with opposite surfaces thereof.

JOHN N. TOOKER.

forming means comprising a pair of members, 

